Adobe Camera Raw for CS5, ACR version 6.7.0.339 (or there may be a more recent version) is downloadable and compatible with the newest Nikon cameras including the D800 and D800e models.
I have it installed with my version of CS5 (although I use CS6).

Camera Raw 7.1 is not backward compatible with CS5 or earlier. Your D800 is OK, but future Nikon camera releases will not be up dated in CS5. Using Lightroom 4.1 is a workaround, in that it uses the most recent version of Camera Raw. You can go from LR to CS5 and make your tweaks. Tim Gray has discussed this issue.

ckcarr wrote:
Adobe Camera Raw for CS5, ACR version 6.7.0.339 (or there may be a more recent version) is downloadable and compatible with the newest Nikon cameras including the D800 and D800e models.
I have it installed with my version of CS5 (although I use CS6).